US3086862A - Roll film for photographic cameras - Google Patents

Roll film for photographic cameras Download PDF

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Publication number
US3086862A
US3086862A US834751A US83475159A US3086862A US 3086862 A US3086862 A US 3086862A US 834751 A US834751 A US 834751A US 83475159 A US83475159 A US 83475159A US 3086862 A US3086862 A US 3086862A
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United States
Prior art keywords
film
strip
metering
area
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US834751A
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English (en)
Inventor
John H Eagle
Nerwin Hubert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eastman Kodak Co
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Eastman Kodak Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to BE625911D priority Critical patent/BE625911A/xx
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to US834751A priority patent/US3086862A/en
Priority to GB27827/60A priority patent/GB965531A/en
Priority to GB24715/63A priority patent/GB965532A/en
Priority to DEE19789A priority patent/DE1182058B/de
Priority to FR836312A priority patent/FR1265662A/fr
Application granted granted Critical
Publication of US3086862A publication Critical patent/US3086862A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C3/00—Packages of films for inserting into cameras, e.g. roll-films, film-packs; Wrapping materials for light-sensitive plates, films or papers, e.g. materials characterised by the use of special dyes, printing inks, adhesives
    • G03C3/02—Photographic roll-films with paper strips
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B1/00—Film strip handling
    • G03B1/60—Measuring or indicating length of the used or unused film; Counting number of exposures
    • G03B1/66—Counting number of exposures

Definitions

  • the present invention relates to roll film for photographic cameras and particularly to photographic roll film provided with a light protective backing paper and having metering perforations therein to facilitate metering of t-he film strip through a camera for exposure and to effect accurate location of successive exposed and processed areas thereon with respect to the optical system of an enlarger or printer.
  • One object of the invention is to provide a light protective paper 'backing strip for photographic roll film provided with metering perforations prepared in such a way at -the location of the perforations in the film that a metering pin can protrude not only through the film itself, but can also either extend through the backing paper or can locally displace lthe paper away from the film without permanently impairing the light sealing properties of the backing strip.
  • Another object of the invention is to provide a photographic film ⁇ strip having light sensitive exposure areas defined by previously exposing the surrounding area of the light sensitive surface of the film strip, such exposure areas being definitely located with respect to metering perforations in the film adapted to accurately locate the exposure areas with respect to the optical system of a camera, enlarger, or printer so that the developed film can be processed by completely automatic equipment thereby reducing the cost of the finished prints.
  • FIG. 1 is a broken plan view of the photographic roll film and backing paper as seen from the backing paper side.
  • FIG. 2 is a broken plan view of he film strip as seen from the side thereof adjacent the backing strip and showing the adhesive binder by means of which the film strip is attached to the paper backing strip.
  • FIG. 3 is a fragmentary view of the film strip ⁇ as seen from the emulsion side thereof, and wherein the large rectangular area designates the light sensitive exposure area.
  • FIGS. 4, 5, 6, and 7 are fragmentary views showing various alternative patterns for slitting the paper backing strip.
  • FIG. 8 is a cross-sectional view taken through a metering perforation along ⁇ a line transverse to the longitudinal axis of the roll film strip and showing the metering pin projecting through a slit of the pattern shown in FIG. 5 in the backing paper.
  • FIG. 9 is a cross-sectional view taken through a metering perforation along the longitudinal axis of the roll film strip and showing the metering pin extending through the perforation in the film and locally displacing a portion of the backing paper slit in the pattern shown in FIG. 7.
  • a basic consideration in the design of film to be used with automatic printing equipment is the provision of means whereby the exposed areas of the film are accurately located with respect to some form of metering perforations in the film in order that each negative area may be accurately and automatically aligned with the optical system of the automatic printer.
  • the prior practice has been to provide spaced metering perforations in the film United States Patent Patented Apr. 23, 1963 which cooperate with a metering mechanism in the camera to determine the relation of the exposed areas to the metering perforations.
  • This system is satisfactory only if the metering mechanism of the particular camera employed is designed to accurately meter the film in accordance with the particular metering arrangement employed in the automatic printer.
  • the print area corresponds in size ⁇ to the field of view of the viewfinder, but the photographer, nevertheless, has what he considers to ybe a justifiable complaint. This problem is avoided by our invention because the final print corresponds exactly to the negative.
  • the previously determined exposure area on the film agrees in size with the viewfinder but viewfinder, but the error is negligible and not so apt to be noted ⁇ by the photographer. This allowance for the variation in metering mechanisms would also allow the fully aligned in the window.
  • This light protective backing paper is equally applicable to any type of roll film employing a metering perforation to locate the film for each exposure, regardless of whether the film strip utilizes the above discussed previously de- That part of the invention dealing with the previously determined film exposure areas in definite relation to the metering perforations is lil'tewise applicable to film with which no protective backing paper is used.
  • FIG. 1 illustrates an assembled roll of film as viewed from the backing paper side and comprising a light protective paper backing strip 10, one end of which is attached to a take-up spool 11 by means of an adhesive paster 12.
  • the roll film illustrated is adapted to be employed in a dual compartment magazine in which the film is rolled upon itself in one compartment and is drawn across the exposure aperture and wound onto the take-up spool 11 in the other compartment. It is understood, however, ythat lthe invention is equally applicable lto conventional forms of roll film wherein the film is wound from a supply spool onto a take-up spool.
  • FIG. 2 and 3 is attached to the front side of backing strip 10 by means of an adhesive paster 14.
  • the film strip has its emulsion side facing downward, the ends and 16 of the film strip being indicated by broken lines.
  • FIG. 2 shows the film strip in the same relative position as in FIG. l but with the backing paper removed.
  • FIG. 3 is a fragmentary view of a portion of the lm as viewed from the emulsion side. Located on the emulsion side of Ithe film, are a series of uniform equi-distantly spaced sensitive exposure areas 17 as shown lby solid lines in FIG. 3, and by broken lines in FIG. 2.
  • each exposure area 17 corresponds to the field of view of the camera viewfinder but is appreciably smaller than the camera exposure aperture to insure that all of the area 17 will be exposed even if the area is not exactly centered in the exposure aperture.
  • a metering perforation 18 is located along the edge of the lm adjacent each exposure area 17 as shown in FIGS.
  • the backing paper is provided with a slit area 21 behind each perforation 18 as shown in FIG. 1. Since no paper is removed in the slitting operation, the light sealing properties of the paper are not impaired so long as the central portion of the slit pattern remains flat.
  • FIGS. 4-7 Various alternative slitting patterns are illustrated in FIGS. 4-7.
  • FIG. 8 is a cross-sectional view taken through a metering perforation along a line transverse to the longitudinal axis of the roll film strip and showing the metering pin 20 projecting through the center slit 24 of the pattern shown in FIG. 5 and into a recess 22 in the film supporting wall 23 of the camera. As shown in FIGS. 4, 5, and 6, are so designed as to allow the metering pin 20 to protrude through -the backing paper, while the pattern illustrated in FIG. 7 4allows the pin to displace the central portion of the pattern out of the plane of the rest of the backing paper.
  • FIG. 8 is a cross-sectional view taken through a metering perforation along a line transverse to the longitudinal axis of the roll film strip and showing the metering pin 20 projecting through the center slit 24 of the pattern shown in FIG. 5 and into a recess 22 in the film supporting wall 23 of the camera. As shown in FIGS.
  • the narrow strips of paper 25, between the parallel slits are twisted to allow the pin 20 to pass through the central slit and, upon the withdrawal of the pin, the natural resiliency of the paper causes the slit area 4to return to its former fiat condition. Even if the pattern does not completely reclose by its own resiliency, it will be restored to its former light protective condition by the advancing of the film and the winding of subsequent convolutions over the slit area.
  • the slitting patterns shown in FIGS. 4 and 6 do not present exactly the same crosssectional ap- 4pearance as that illustrated in FIG. 8, the basic principle is the same. The latter two patterns are preferable to that shown in FIG. 5 in that less distortion of the paper occurs when the pin passes through the center slit, but the slitting operation iself is more complicated than that involved in producing the pattern shown in FIG. 5.
  • FIG. 7 illustrates a slitting pattern in which the metering pin 20 does not extend through a slit in the backing paper but rather displaces the central portion of the pattern.
  • FIG. 9 is -a cross-sectional view through a metering perforation along the longitudinal axis of the roll film strip to illustrate the operation of the pattern shown in FIG. 7.
  • This pattern comprises two interlocking U-shaped slits 26 that define an imaginary S-shaped stress line 27, indicated in broken lines. Pressure of the pin 20 against the central portion of the area enclosed by the slits 26 causes the imaginary line 27 to be somewhat straightened, thereby opening the slits at points 28 and 29 as seen in FIG. 9. This opening at points 28 and 29 allows the pin to press the central portion of the pattern against the bottom of the recess 22 in the film support wall 23.
  • the advantage of this pattern lies in its particularly good selfrestorative qualities.
  • an additional slitting pattern 30 is illustrated near the extreme end of the backing paper and beyond the end of the film strip. This pattern is provided to effect the stopping of the camera winding mechanism at the end of the roll in the event that it is desired to prevent the entire strip from being wound onto the take-up spool.
  • Indicia may be printed on the back surface of the backing paper as shown in FIG. 1 to indicate the beginning and end of the roll and the number of the exposure area in the exposure aperture through a window in the back of the camera.
  • the numbering system illustrated employs a continuous line of numbers in order that the viewing window may be located at any desired point along the center line of the film strip behind the exposure aperture.
  • a roll film for use in a photographic camera havin the form of a horizontal ing a movable film metering member adapted to ride on one surface of the film 4to stop the advance thereof upon penetration of the member into an opening therein; said film comprising: a flexible support web having a lightsensitive layer on the front surface thereof and provided along its length with a series of metering openings extending through said web and adapted to be penetrated by said film metering member to stop the advance of film in said camera, and a light protective backing strip overlying at least part of the rear surface of said web; a slit area in said strip adjacent each of said metering openings, each of said slit areas having three parallel longitudinal light-tight slits extending through said backing strip, the center one of said slits being located behind the longitudinal center line of said metering opening adjacent thereto, said slits being of such configuration as to allow a portion of said lm metering member to extend across the plane of said strip surrounding said area in the course of penetration
  • a roll film for use in a photographic camera having a movable film metering member adapted to ride on one surface of the film to stop the advance thereof upon penetration of the member into an opening therein; said film' comprising: a flexible support web having a lightsensitive layer on the front surface thereof and provided along its length with a series of metering openings extending through said web and adapted to be penetrated by said film metering member to stop the advance of film in said camera, and a light protective backing strip overlying at least a part of the rear surface of said web; a slit area in said strip adjacent each of said metering openings, each of said slit areas having three light-tight slits extending through said backing strip comprising a center slit including an elongated straight longitudinal middle portion located behind the longitudinal center line of said opening and having an upwardly turned arcuate continuation adjoining one end thereof and a downwardly turned arcuate continuation adjoining the opposite end thereof, and second and third straight slits of approximately the same length as the straight
  • a roll film for use in a photographic camera having a movable film metering member adapted to ride on one surface of the film to stop the advance thereof upon penetration of the member into an opening therein; said film comprising: a flexible support web having a light-sensitive layer on the front surface thereof and provided along its length with a series of metering openings extending through said web and adapted to be penetrated by said film metering member to stop the advance of film in said camera, and a light protective backing strip overlying at least a part of the rear surface of said web; a slit area in said strip adjacent each of said metering openings, each of said slit areas including three light-tight slits extending through said backing strip, one of said slits being ogee curve disposed along a first imaginary line behind the longitudinal center line of said metering opening adjacent said area, a second of said slits being in the form of a straight.
  • slits centrally located along a second imaginary line substantially tangent to one arc of said curve, and the third slit located symmetrically with respect to said second slit on the opposite side of said first imaginary line, said slits being of such configuration as to allow a portion of said film metering member to extend across the plane of said strip surrounding said area in the course of penetration movement of the member without permanently impairing the light protective properties of the strip in said area when said member is withdrawn from said opening.
  • a roll film for use in a photographic camera having a movable film metering member adapted to ride on one surface of the film to stop the advance thereof upon penetration of the member into an opening therein; said film comprising: a flexible support web having a lightsensitive layer on the front surface thereof and provided along its length with -a series of metering openings extending through said web and adapted to be penetrated by said film metering member to stop the advance of film in said camera, and a light protective backing strip overlying at least a part of the rear surface of said web; a slit area in said strip adjacent each of said metering openings, each of said slit areas comprising tivo like substantially U-shaped slits extending through said backing strip and disposed in interlocking nonintersecting relation with their respective arms facing one another and spaced longitudinally of the backing strip, the bases of said U- shaped slits being located on opposite sides of and equidistantly spaced from an imaginary line behind the longitudinal center line of said metering opening
  • a roll film for use in a photographic camera having a movable film metering member adapted to ride on one surface of the film to stop the advance thereof upon penetration of the member into an opening therein; said film comprising: a flexible support web haing a light-sensitive layer on the front surface thereof and provided along its length with a series of metering openings extending through said web and adapted to be penetrated by said film metering member to stop the advance of film in said camera, and a light protective backing strip overlying at least a part of the rear surface of said web; a slit area in said strip adjacent each of said metering openings, each of said slit areas comprising two interlocking nonintersecting elongated light-tight slits extending through said backing strip, the central portions of said slits being located on opposite sides of and equidistantly spaced from an imaginary line behind the longitudinal center line of said metering opening adjacent said area, the ends of said slits extending at least to said imaginary line, said
  • a roll film for use in a photographic camera having a movable film metering member adapted to ride on one surface of the film to stop the advance thereof upon penetration of the member into an opening therein; said film comprising: a flexible support web having a lightsensitive layer on the front surface thereof and provided along its length with a series of metering openings extending through said web and adapted to be penetrated by said film metering member to stop the advance of film in said camera, and a light protective backing strip overlying at least a part of the rear surface of said web; a slit area in said strip adjacent each of said metering openings, each of said slit areas having two light-tight slits extending through said backing strip comprising a first longitudinally elongated slit including a central portion thereof spaced by a first distance from one side of an imaginary line behind the longitudinal center line ofsaid metering opening adjacent said area, the ends of said first slit extending at least -to said imaginary line, and a second slit on
  • a roll film for use in a photographic camera having a movable film metering member adapted to normally ride against one surface of the film to stop the advance of a given length of the film upon penetration of the member into a metering opening therein and adapted to be withdrawn from said opening to free the film for a subsequent advance, said film comprising: a flexible support web having a light-sensitive layer on the front surface thereof, said layer including at least one latent image defining a plurality of light-sensitive exposure areas spaced along said web, said web being provided along its length with a plurality of spaced metering openings extending therethrough and to be penetrated by said metering member, each of said openings bearing a predetermined spatial relation with a corresponding one of said exposure areas; and a light protective backing strip overlying at least part of the rear surface of Said web, a slit area in said strip adjacent each of said openings defining at least two unconnected and normally light-tightslits extending through said strip and substantially in the same direction, said
  • a roll film for use in a photographic camera having a movable metering member adapted to normally ride against one surface of the film to stop the advance of a given length of the film upon penetration of the member into a metering opening therein and adapted to be withdrawn from said opening to free the film for a subsequent advance, said lm comprising: a flexible support web having an unexposed light-sensitive layer on the front surface thereof, said web provided along its length with a plurality of spaced metering openings extending therethrough and to be penetrated by said metering member to stop the advance of film through a camera; and a light protective backing strip overlying at least part of the rearsurface of said web, a slit area in said strip adjacent each of said metering openings defining at least two unconnected and normally light-tight slits extending through said strip, said slits being configured so as to allow at least a portion of said area of the strip to be displaced from the plane ofthe strip when pressure is applied transversely of said strip by
  • a roll film according to claim 8 wherein the said slits extend substantially longitudinally of said strip.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Structure And Mechanism Of Cameras (AREA)
  • Paper (AREA)
US834751A 1959-08-19 1959-08-19 Roll film for photographic cameras Expired - Lifetime US3086862A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BE625911D BE625911A (xx) 1959-08-19
US834751A US3086862A (en) 1959-08-19 1959-08-19 Roll film for photographic cameras
GB27827/60A GB965531A (en) 1959-08-19 1960-08-11 Improvements in or relating to photographic roll films
GB24715/63A GB965532A (en) 1959-08-19 1960-08-11 Improvements in or relating to photographic roll films
DEE19789A DE1182058B (de) 1959-08-19 1960-08-17 Photographischer Rollfilm
FR836312A FR1265662A (fr) 1959-08-19 1960-08-19 Nouvelle pellicule photographique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US834751A US3086862A (en) 1959-08-19 1959-08-19 Roll film for photographic cameras

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US3086862A true US3086862A (en) 1963-04-23

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US834751A Expired - Lifetime US3086862A (en) 1959-08-19 1959-08-19 Roll film for photographic cameras

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US (1) US3086862A (xx)
BE (1) BE625911A (xx)
DE (1) DE1182058B (xx)
GB (2) GB965531A (xx)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3138084A (en) * 1961-08-04 1964-06-23 Eastman Kodak Co Roll film magazine and camera adapted to use same
US3234024A (en) * 1963-01-25 1966-02-08 Polaroid Corp Photographic film roll and methods and apparatus for manufacturing same
US3647465A (en) * 1969-08-22 1972-03-07 Menashe Shamay Photographic film roll
US4978985A (en) * 1989-07-24 1990-12-18 Eastman Kodak Company Film cassette having film-exposure status indicator
US4998123A (en) * 1989-11-14 1991-03-05 Eastman Kodak Company Film cassette with exposure status indicator
US5047794A (en) * 1990-07-31 1991-09-10 Eastman Kodak Company Film cassette with lock-out means for preventing load of exposed film
US5106030A (en) * 1990-07-31 1992-04-21 Eastman Kodak Company Film cassette with exposure status indicator
US5192648A (en) * 1992-02-18 1993-03-09 Eastman Kodak Company Photographic film and cartridge

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE791396A (fr) * 1971-11-15 1973-05-14 Eastman Kodak Co Dispositif de guidage et d'arret d'une bande et chargeur de produit photographique muni d'un tel dispositif

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US375231A (en) * 1887-12-20 Charles h
US1795050A (en) * 1928-07-16 1931-03-03 Luther G Simjian Apparatus for producing margined photographs
US1826695A (en) * 1929-06-27 1931-10-06 Eastman Kodak Co Light protected motion picture film
DE548322C (de) * 1932-04-11 Zeiss Ikon Ag Tageslichtpackung fuer perforierten Film
DE557695C (de) * 1932-08-26 Zeiss Ikon Akt Ges Tageslichtpackung fuer perforierten Film
AU940432A (en) * 1932-09-27 1933-08-03 Von Frommer Rudolf Photographic roll film
US2612452A (en) * 1948-11-02 1952-09-30 Polaroid Corp Photographic product

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE511166C (de) * 1929-07-05 1930-10-27 Hendrik Hans Hesselink Verfahren zur Herstellung lichtempfindlicher Rollfilme oder Platten
DE601100C (de) * 1931-12-24 1934-08-08 Hermann Kaatz Dr Photographischer Rollfilm
GB435467A (en) * 1934-03-23 1935-09-23 Eastman Kodak Co Improvements in or relating to photographic roll films

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US375231A (en) * 1887-12-20 Charles h
DE548322C (de) * 1932-04-11 Zeiss Ikon Ag Tageslichtpackung fuer perforierten Film
DE557695C (de) * 1932-08-26 Zeiss Ikon Akt Ges Tageslichtpackung fuer perforierten Film
US1795050A (en) * 1928-07-16 1931-03-03 Luther G Simjian Apparatus for producing margined photographs
US1826695A (en) * 1929-06-27 1931-10-06 Eastman Kodak Co Light protected motion picture film
AU940432A (en) * 1932-09-27 1933-08-03 Von Frommer Rudolf Photographic roll film
US2612452A (en) * 1948-11-02 1952-09-30 Polaroid Corp Photographic product

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3138084A (en) * 1961-08-04 1964-06-23 Eastman Kodak Co Roll film magazine and camera adapted to use same
US3234024A (en) * 1963-01-25 1966-02-08 Polaroid Corp Photographic film roll and methods and apparatus for manufacturing same
US3647465A (en) * 1969-08-22 1972-03-07 Menashe Shamay Photographic film roll
US4978985A (en) * 1989-07-24 1990-12-18 Eastman Kodak Company Film cassette having film-exposure status indicator
US4998123A (en) * 1989-11-14 1991-03-05 Eastman Kodak Company Film cassette with exposure status indicator
US5047794A (en) * 1990-07-31 1991-09-10 Eastman Kodak Company Film cassette with lock-out means for preventing load of exposed film
US5106030A (en) * 1990-07-31 1992-04-21 Eastman Kodak Company Film cassette with exposure status indicator
US5192648A (en) * 1992-02-18 1993-03-09 Eastman Kodak Company Photographic film and cartridge

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Publication number Publication date
DE1182058B (de) 1964-11-19
GB965532A (en) 1964-07-29
BE625911A (xx)
GB965531A (en) 1964-07-29

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